转底炉内温度场及流场的数值模拟

Numerical Simulation of Temperature Field and Flow Field in Rotary Hearth Furnace

利用Fluent软件建立了转底炉炉内温度场及流场的数学模型,采用κ-ε模型,辐射模型,非预混燃烧模型模拟炉内的辐射传热和湍流流动,分析了烧嘴和助燃风喷嘴的选择与布置对炉内的温度及速度分布的影响。结果表明,转底炉预热段与加热段采用炉顶布置平焰烧嘴供燃料,炉膛下部布置喷嘴供助燃风能获得很好的温度场和流场来满足工作需要;还原段选择蓄热式烧嘴供给燃料,既满足了高温还原的温度要求,也达到充分回收利用烟气余热的效果。

A mathematical model of the temperature field and flow field in Rotary Hearth Furnace （RHF） was established with the commercial software Fluent. Using the κ- ε turbulent model, radiation models, non-premixed combustion mode of PDF, the influence of nozzle＇ s type and distribution on the temperature field and flow field was studied. The results showed that the great temperature field and flow field was formed when flat flame burner was arranged on the top of preheating and heating section in RHF, and both high-temperature and recycling of waste heat was achieved when regenerative burner was arranged on the side wall.